Automated Driving Path Planner Resend Mechanism
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Solution Overview
Problem
Existing automated driving systems often fail to maintain safe operation when the path planner application does not meet a threshold performance level, leading to abrupt cancellation of autonomous driving and potential safety hazards.
Innovation Solution
The automated driving system is configured to resend previous commands to vehicle systems to maintain the planned vehicle path and send notifications to drivers to take control, allowing for a smooth transition from autonomous to manual operation, thereby ensuring safety and continuity of navigation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the automated driving system cancels autonomous operation when the path planner application does not meet a threshold performance level, then the system maintains safety by avoiding unreliable path planning, but the system experiences abrupt stops or deviations that create potential safety hazards
Solution Approach 1:
The system resends a previous command from the path planner to vehicle systems in advance, before the unreliable path planning fully manifests, to maintain continuous and smooth vehicle operation along the originally planned trajectory
Solution Approach 2:
The system provides a缓冲 period by resending previous commands, cushioning against the harmful effects of path planner failures and allowing time for driver intervention without abrupt stops or deviations
2Reliability
If the automated driving system resends previous commands to maintain the planned vehicle path, then the system ensures continuity and safety of navigation, but the system complexity increases due to additional command management mechanisms
Solution Approach 1:
The system creates a copy of a previous valid command from the path planner and resends it to vehicle systems, avoiding the need for complex alternative path planning mechanisms while maintaining navigation continuity
Solution Approach 2:
The system introduces an intermediary command resending mechanism that sits between the path planner and vehicle systems, managing the transition during path planner failures without requiring complex re-planning algorithms
3Duration of action of moving object
If the automated driving system allows extended operation after path planner performance degradation, then the system maintains vehicle velocity and spacing for driver intervention, but the risk of unsafe operation increases if the path planner continues to underperform
Solution Approach 1:
The system converts the harmful effect of path planner underperformance into a beneficial extended operation period by resending previous commands, allowing sufficient time for driver intervention while maintaining safe vehicle operation
Data Source
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AI summary
A system, device, and methods of automated driving are disclosed. One example method includes determining a planned vehicle path using a path planner application receiving information based on inputs to one or more sensors disposed on a vehicle. The method further includes sending a command to one or more vehicle systems to control the vehicle to follow the planned vehicle path. While the vehicle follows the planned vehicle path, the method includes receiving an indication that the path planner application is not meeting a threshold performance level. After receiving the indication that the path planner application is not meeting the threshold performance level, the method further includes resenting the previously sent command to the one or more vehicle systems to control the vehicle to follow the planned vehicle path.